cpu_id.h revision f047e7ca6983218eed7703c7afd51fed7bd3b5c9
17cd8149e2cbad8b1ff6d481c37a4775d3c8cf2faShri Borde/* 233cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkamp * Copyright 2011 The LibYuv Project Authors. All rights reserved. 37cd8149e2cbad8b1ff6d481c37a4775d3c8cf2faShri Borde * 47cd8149e2cbad8b1ff6d481c37a4775d3c8cf2faShri Borde * Use of this source code is governed by a BSD-style license 57cd8149e2cbad8b1ff6d481c37a4775d3c8cf2faShri Borde * that can be found in the LICENSE file in the root of the source 67cd8149e2cbad8b1ff6d481c37a4775d3c8cf2faShri Borde * tree. An additional intellectual property rights grant can be found 7f047e7ca6983218eed7703c7afd51fed7bd3b5c9Hangyu Kuang * in the file PATENTS. All contributing project authors may 87cd8149e2cbad8b1ff6d481c37a4775d3c8cf2faShri Borde * be found in the AUTHORS file in the root of the source tree. 97cd8149e2cbad8b1ff6d481c37a4775d3c8cf2faShri Borde */ 107cd8149e2cbad8b1ff6d481c37a4775d3c8cf2faShri Borde 1133cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkamp#ifndef INCLUDE_LIBYUV_CPU_ID_H_ // NOLINT 127cd8149e2cbad8b1ff6d481c37a4775d3c8cf2faShri Borde#define INCLUDE_LIBYUV_CPU_ID_H_ 137cd8149e2cbad8b1ff6d481c37a4775d3c8cf2faShri Borde 1433cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkamp#include "libyuv/basic_types.h" 1533cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkamp 1633cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkamp#ifdef __cplusplus 177cd8149e2cbad8b1ff6d481c37a4775d3c8cf2faShri Bordenamespace libyuv { 1833cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkampextern "C" { 1933cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkamp#endif 207cd8149e2cbad8b1ff6d481c37a4775d3c8cf2faShri Borde 21f047e7ca6983218eed7703c7afd51fed7bd3b5c9Hangyu Kuang// Internal flag to indicate cpuid requires initialization. 2233cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkampstatic const int kCpuInitialized = 0x1; 237cd8149e2cbad8b1ff6d481c37a4775d3c8cf2faShri Borde 2433cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkamp// These flags are only valid on ARM processors. 2533cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkampstatic const int kCpuHasARM = 0x2; 2633cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkampstatic const int kCpuHasNEON = 0x4; 2733cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkamp// 0x8 reserved for future ARM flag. 287cd8149e2cbad8b1ff6d481c37a4775d3c8cf2faShri Borde 2933cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkamp// These flags are only valid on x86 processors. 3033cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkampstatic const int kCpuHasX86 = 0x10; 3133cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkampstatic const int kCpuHasSSE2 = 0x20; 3233cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkampstatic const int kCpuHasSSSE3 = 0x40; 3333cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkampstatic const int kCpuHasSSE41 = 0x80; 3433cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkampstatic const int kCpuHasSSE42 = 0x100; 3533cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkampstatic const int kCpuHasAVX = 0x200; 3633cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkampstatic const int kCpuHasAVX2 = 0x400; 37f047e7ca6983218eed7703c7afd51fed7bd3b5c9Hangyu Kuangstatic const int kCpuHasERMS = 0x800; 38f047e7ca6983218eed7703c7afd51fed7bd3b5c9Hangyu Kuangstatic const int kCpuHasFMA3 = 0x1000; 39f047e7ca6983218eed7703c7afd51fed7bd3b5c9Hangyu Kuangstatic const int kCpuHasAVX3 = 0x2000; 40f047e7ca6983218eed7703c7afd51fed7bd3b5c9Hangyu Kuang// 0x2000, 0x4000, 0x8000 reserved for future X86 flags. 41f047e7ca6983218eed7703c7afd51fed7bd3b5c9Hangyu Kuang 42f047e7ca6983218eed7703c7afd51fed7bd3b5c9Hangyu Kuang// These flags are only valid on MIPS processors. 43f047e7ca6983218eed7703c7afd51fed7bd3b5c9Hangyu Kuangstatic const int kCpuHasMIPS = 0x10000; 44f047e7ca6983218eed7703c7afd51fed7bd3b5c9Hangyu Kuangstatic const int kCpuHasDSPR2 = 0x20000; 4533cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkamp 4633cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkamp// Internal function used to auto-init. 4733cfdeb7b267ab635413797fffb046b73272f7ecHendrik DahlkampLIBYUV_API 4833cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkampint InitCpuFlags(void); 4933cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkamp 5033cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkamp// Internal function for parsing /proc/cpuinfo. 5133cfdeb7b267ab635413797fffb046b73272f7ecHendrik DahlkampLIBYUV_API 5233cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkampint ArmCpuCaps(const char* cpuinfo_name); 537cd8149e2cbad8b1ff6d481c37a4775d3c8cf2faShri Borde 547cd8149e2cbad8b1ff6d481c37a4775d3c8cf2faShri Borde// Detect CPU has SSE2 etc. 5533cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkamp// Test_flag parameter should be one of kCpuHas constants above. 5633cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkamp// returns non-zero if instruction set is detected 5733cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkampstatic __inline int TestCpuFlag(int test_flag) { 5833cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkamp LIBYUV_API extern int cpu_info_; 59f047e7ca6983218eed7703c7afd51fed7bd3b5c9Hangyu Kuang return (!cpu_info_ ? InitCpuFlags() : cpu_info_) & test_flag; 6033cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkamp} 617cd8149e2cbad8b1ff6d481c37a4775d3c8cf2faShri Borde 627cd8149e2cbad8b1ff6d481c37a4775d3c8cf2faShri Borde// For testing, allow CPU flags to be disabled. 6333cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkamp// ie MaskCpuFlags(~kCpuHasSSSE3) to disable SSSE3. 6433cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkamp// MaskCpuFlags(-1) to enable all cpu specific optimizations. 65f047e7ca6983218eed7703c7afd51fed7bd3b5c9Hangyu Kuang// MaskCpuFlags(1) to disable all cpu specific optimizations. 6633cfdeb7b267ab635413797fffb046b73272f7ecHendrik DahlkampLIBYUV_API 677cd8149e2cbad8b1ff6d481c37a4775d3c8cf2faShri Bordevoid MaskCpuFlags(int enable_flags); 687cd8149e2cbad8b1ff6d481c37a4775d3c8cf2faShri Borde 6933cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkamp// Low level cpuid for X86. Returns zeros on other CPUs. 70f047e7ca6983218eed7703c7afd51fed7bd3b5c9Hangyu Kuang// eax is the info type that you want. 71f047e7ca6983218eed7703c7afd51fed7bd3b5c9Hangyu Kuang// ecx is typically the cpu number, and should normally be zero. 7233cfdeb7b267ab635413797fffb046b73272f7ecHendrik DahlkampLIBYUV_API 73f047e7ca6983218eed7703c7afd51fed7bd3b5c9Hangyu Kuangvoid CpuId(uint32 eax, uint32 ecx, uint32* cpu_info); 7433cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkamp 7533cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkamp#ifdef __cplusplus 7633cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkamp} // extern "C" 777cd8149e2cbad8b1ff6d481c37a4775d3c8cf2faShri Borde} // namespace libyuv 7833cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkamp#endif 797cd8149e2cbad8b1ff6d481c37a4775d3c8cf2faShri Borde 8033cfdeb7b267ab635413797fffb046b73272f7ecHendrik Dahlkamp#endif // INCLUDE_LIBYUV_CPU_ID_H_ NOLINT 81